Automatic door opening and closing device.



-'--*-N6'826,325 PATENTED JULY 17, 1906i C. GAMACHE.

AUTOMATIC DOOR OPENING AND CLOSING DEVICE.

APPLIGATION FILED MAR. 19. 190e.

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C. GAMAGHE.

AUTOMATIC DOOR OPENING AND CLOSING DEVICE.

APPLIOATION FILED MAB.. 19. 1.906.

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NITED STATES PATENT OFFICE.

OLEOPHAS GAMAOHE, OF BAR-RE, VERMONT.

AUTOMATIC DOOR OPENING AND CLOSIG DEVICE.

.To all whom it may concern:

Be it known that I, CLEoPHAs GAMACHE, a subject of the King of Great Britain, and a resident of Barre, in the county of Washington and State of Vermont, have invented a new and Im roved Automatic Door Opening and Closing evice, of which the following is a full, clear, and exact description. I

The object of the invention is to provide a new and improved automatic door opening and closing device controlled by a person walking upon a movable platform arranged adjacent 'to the door, the platform stepped on by the person being pressed down to start a motor connected with one side of the door to draw the latter to open position, the platv form when released by the person causing the motor to stop runnin spring or weight to draw tie -door to closed g and allowing a position.

The invention consists of novel features and 'parts and combinations of the same, which will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of thc invention is represented in thc accompanyingdrawings, vformmg a part of this specification, 1n which similar characters of reference indicate correaspondineg parts in all the views.

Figure 1 1s a side elevation of the improvement as applied, the door being in a closed position and parts being broken out and parts being shown in section. Fig. 2 is a like -viewpfthe same, showing the door open.

Fig.v 3v is -atransverse section of the same on the line 3 3 of Fig. 1. Fig. 4 is an enlarged a lcross-Section of the door-hanger, the section being on the line 4 4 of Fig. 5. Fig. 5 is a side l elevation of the same; and Fig. 6 is a crosssectio'n of the door and door-casing, showing Y friction guide-rollers for the lower end of the door.

A door A for closing an opening in a Wall B Aof a vbuildin is provided at its upper end with a dooranger O of-any approved construction, preierably one having ball-bearings, to allow an easy sliding of the door-that is, for the door to move into an open or a closed position. On one side of the door A is secured a bracket A', in which is journaled a splrocket-wheel D, connected by a sprocketain D' with sprocket-wheel D2, secured on the shaftfof a motor E, attached to the wall B a distance to one side of the door A, as plainly indicated in Figs. lfand 2. On the sprocket- Wheel D is secured a brake-wheel F, engaged Specification of Letters Patent.

Application filed March 19, 1906. Serial No. 306,794.

Patented July 17, 1906.

at its peripheral face by a brake-shoe F', held on the free end of a spring F2, attached to the door A, (see Fig. 1,) the said brake-shoe FTQ-f2.I and brake-Wheel F normally 'holding thcoly sprocket-wheel D against turning the time 'pj-f t e door A moves from a closed into an open position. When the door A is in a closed osition, as shown in Fig. 1, and the motor is started, then the sprocket-chain D' is driven, and as it passes over the sprocket-wheel D, held stationary for the time being, it is evi-a dent that a pull is insured on the said sprocket-x .l wheel D by the sprocket-chain D', and con-r sequently the door A is drawn into an open" 7o position. (See Fig. 2.) When the door AVS reaches an open position, if the motor Eris,y still running the sprocket-wheel D is turned,y as the power of the motor overcomes thefj action of the brake-shoe F' on the brake- 75 wheel F.

The starting and sto ping mechanismof' the motor E is controlle by a platform G, ar ranged underneath. the door A and extend ing a suitable distance beyond it, as willbeA readily understood by reference to Fig. 3, and the said platform Gis mounted at its unf der side on sprin s G', resting on the top of aY recessed portion of the floor of the build-aw; ing, said platform G being guided in its upward and downward movement by suitable guideways G2.

In orderl to control the startinor and stopping mechanism of the motor from the platform G, the followin arran ement is made, it bein understoo that t e motor shown in the rawin s is an electric motor, and the circuit-wires F' and E2 of thismotor are connected with contact-plates' Gs and G4, of which the contact-plates Gs are secured to the under side of the platform G andthe contact-plates G4 are fixed on the building and are normally out of contact with thecontactplates G3, as the springs G' normally hold the platform G in an uppermost position. Now

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the person, and consequently the contactplates G3 move into enga ement with the contact-plates G4 to close t e circuit for the electric motor E, and thereby start the motor. As soon as this takes place the door -A is drawn open by the action of the s rocket-l Wheel and chain connection D D'- 2 above described. The person on the platform G x 1cv can now step through the open doorway, and

as soon as the person leaves the platform then the springs G return the platform to a normal position, whereby the contact-plates G3 move out of contact with the contactplates G4, and consequently the motor-circuit is opened andthe motor stops running.

In order to return the door A-that is, to move it back into a closed position-a coilsprin H is provided, held in a suitable casing and .connected by a chain or a like flexible connection H2 with the door A at or near its upper end, as plainly illustrated in Figs. 1 and 2. The casing H is attached to the wall B, and the tension of the spring H can be regulated by a suitable crank-arm H3, as shown in Figs. 1 and 2. When the door A is moved into an open position, as above described, the spring H is put under heavy tension, and as soon as the person steps off the platform G and the motor stops runnin then the spring H draws the door A to closer? position.

In order to limit the opening movement of the door A, suitable spring-pressed stops I are provided, arranged on the wall B, and similar stops I limit the closing movement of the door A.

Roller-guides J, held on the wall B, engage Aopposite faces of the door A at or near the lower end thereof to insure a proper sliding of the door into an open or a closed position.

Although I have shown and described an electric motor, it is evident I do not limit myself to such a motor, as other motors may be employed for the same purpose, it being, however, understood that the starting and stopping mechanism of the motor is controlled by the movable platform G.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. An automatic door opening and closing device, comprising a motor for movin the door in one direction, a coil-spring hel in a casing and havin a flexible connection with the door for moving the door in an o posite direction, and a movable platform a jacent to the door and controlling the starting and stopping mechanism of the said motor.

2. An automatic door openin and closing device, comprising a motor, a (Ievice on the door mounted to turn, a connection between the motor and said device for exerting a pull on said device to'movc the door into an open position, means for reventing said device from turning while tlie door is moving into an open position, a movable platform adjacent to the door and controlling the startin and stopping mechanism of the motor, and means for closing the door on releasing the platform.

3. An automatic door opening and closing device, comprising a motor, a sprocket-wheel and chain connection between the motor and one side of the door, a brake for the sprocketwheel on the door, and a platform adjacent to the door and controlling the starting and stopping mechanism of the said motor.

4. An automatic door opening and closing device, comprising a motor, a sprocket-wheel and chain connection between the motor and one side of the door, a brake for the sprocketwheel on the door, a platform adjacent to the door and controlling the starting and stopping mechanism of the said motor, a spring connected with the opposite side of the door, and means for regulating the tension of the said spring.

5. An automatic door opening and closing divice, comprising an electric motor, a device on the door mounted to turn, a connection between the motor and said device for exerting a pull on the latter, a brake for the said device, and a movable platform adjacent to the door and controlling the circuit for the said electric motor.

6. An automatic door opening and closing device, comprising an electric motor, a

motor, a sprocket-wheel carried by the door and connected by a sprocket-chain with the sprocket-wheel on the motor-shaft, a brake for the sprocket-wheel on the door, a movable platform under the door'and extending on opposite faces thereof, springs on which the platform is mounted, suitable contactplates in the said platform moving with the same, and fixed contact-plates adapted to be engaged by the said platform 'contact-plates, the electric circuit-wires of the motor being connected. with the said -platform contactplates and the said fixed contact-plates.

, 7. An automatic door opening and closing device, comprising a slidable door, an overhead hanger for the door having ball-bearings, a motor at one side of the door, sprocketwheels, one on the motor-shaft and the other on the door, a sprocket-chain connecting the sprocket-wheels with each other, a brake for t e sprocket-wheel on the door, and a movable platform under the door and controlling the starting and stopping mechanism of the motor.

8. An automatic door opening and closing device, com rising a motor, a rotatable device on the dlbor, means connecting the motor CLEOPHAS GAMACHE.

Witnesses:

G. L. GREGOIRE, WILLIAM BARCLAY.

and said device for exerting a pull on the latsprocket-wheel secured on the shaft of the IOO IIO 

